Problem Statement

There are 4 squares lined up horizontally.

You are given a string S of length 4 consisting of 0 and 1.
If the i-th character of S is 1, there is a person in the i-th square from the left;
if the i-th character of S is 0, there is no person in the i-th square from the left.

Now, everyone will move to the next square to the right simultaneously. By this move, the person who was originally in the rightmost square will disappear.

Determine if there will be a person in each square after the move. Print the result as a string in the same format as S. (See also Sample Input / Output for clarity.)

Constraints

• S is a string of length 4 consisting of 0 and 1.

Sample Input 1

1011

Sample Output 1

0101

After the move, the person who was originally in the 1-st square will move to the 2-nd square,
the person in the 3-rd square to the 4-th square,
and the person in the 4-th square will disappear.

Sample Input 2

0000

Sample Output 2

0000

Sample Input 3

1111

Sample Output 3

0111

Problem Statement

There was a contest with N problems. The i-th (1\leq i\leq N) problem was worth A_i points.

Snuke took part in this contest and solved M problems: the B_1-th, B_2-th, \ldots, and B_M-th ones. Find his total score.

Here, the total score is defined as the sum of the points for the problems he solved.

Constraints

• 1\leq M \leq N \leq 100
• 1\leq A_i \leq 100
• 1\leq B_1 < B_2 < \ldots < B_M \leq N
• All values in the input are integers.

Sample Input 1

3 2
10 20 30
1 3

Sample Output 1

40

Snuke solved the 1-st and 3-rd problems, which are worth 10 and 30 points, respectively. Thus, the total score is 10+30=40 points.

Sample Input 2

4 1
1 1 1 100
4

Sample Output 2

100

Sample Input 3

8 4
22 75 26 45 72 81 47 29
4 6 7 8

Sample Output 3

202

Problem Statement

You are given an integer N and a sequence A=(A _ 1,A _ 2,\ldots,A _ N) of length N.

Given Q queries, process them in the given order. Each query is of one of the following two kinds:

• 1 k x : set the value A _ k to x.
• 2 k : print the value A _ k.

Constraints

• 1 \leq N \leq 10 ^ 5
• 1 \leq Q \leq 10 ^ 5
• 0 \leq A _ i \leq 10 ^ 9\ (1\leq i\leq N)
• 1\leq k\leq N for all queries.
• 0\leq x\leq 10 ^ 9 for all queries of the first kind.
• There is at least one query of the second kind.
• All values in the input are integers.

Sample Input 1

3
1 3 5
7
2 2
2 3
1 3 0
2 3
1 2 8
2 2
2 1

Sample Output 1

3
5
0
8
1

Initially, A=(1,3,5).

• For the 1-st query, A=(1,3,5), where A _ 2=3, so 3 should be printed.
• For the 2-nd query, A=(1,3,5), where A _ 3=5, so 5 should be printed.
• The 3-rd query sets the value A _ 3 to 0, making A=(1,3,0).
• For the 4-th query, A=(1,3,0), where A _ 3=0, so 0 should be printed.
• The 5-th query sets the value A _ 2 to 8, making A=(1,8,0).
• For the 6-th query, A=(1,8,0), where A _ 2=8, so 8 should be printed.
• For the 7-th query, A=(1,8,0), where A _ 1=1, so 1 should be printed.

Sample Input 2

5
22 2 16 7 30
10
1 4 0
1 5 0
2 2
2 3
2 4
2 5
1 4 100
1 5 100
2 3
2 4

Sample Output 2

2
16
0
0
16
100

Sample Input 3

7
478 369 466 343 541 42 165
20
2 1
1 7 729
1 6 61
1 6 838
1 3 319
1 4 317
2 4
1 1 673
1 3 176
1 5 250
1 1 468
2 6
1 7 478
1 5 595
2 6
1 6 599
1 6 505
2 3
2 5
2 1

Sample Output 3

478
317
838
838
176
595
468

Problem Statement

Takahashi has N friends. They have nicknames: Friend 1, Friend 2, \ldots, Friend N.

One day, Takahashi accidentally let one of his friends, Friend X, learn his shameful secret.
For each i = 1, 2, \ldots, N, when Friend i learns the secret, he/she will share it with Friend A_i, if Friend A_i has not already learned it.

How many of Takahashi's friends will learn the secret in the end?

Constraints

• 2 \leq N \leq 10^5
• 1 \leq X \leq N
• 1 \leq A_i \leq N
• A_i \neq i
• All values in input are integers.

Sample Input 1

4 2
3 1 1 2

Sample Output 1

3

Takahashi's secret will be learned by Friend 1, Friend 2, and Friend 3, as follows.

• One day, Takahashi let Friend 2 learn the secret.
• Friend 2 shares it with Friend 1.
• Friend 1 shares it with Friend 3.

In the end, three of his friends learn the secret, so we print 3.

Sample Input 2

20 12
7 11 10 1 7 20 14 2 17 3 2 5 19 20 8 14 18 2 10 10

Sample Output 2

7

Problem Statement

There are N stations on a certain line operated by AtCoder Railway. The i-th station (1 \leq i \leq N) from the starting station is named S_i.

Local trains stop at all stations, while express trains may not. Specifically, express trains stop at only M \, (M \leq N) stations, and the j-th stop (1 \leq j \leq M) is the station named T_j.
Here, it is guaranteed that T_1 = S_1 and T_M = S_N, that is, express trains stop at both starting and terminal stations.

For each of the N stations, determine whether express trains stop at that station.

Constrains

• 2 \leq M \leq N \leq 10^5
• N and M are integers.
• S_i (1 \leq i \leq N) is a string of length between 1 and 10 (inclusive) consisting of lowercase English letters.
• S_i \neq S_j \, (i \neq j)
• T_1 = S_1 and T_M = S_N.
• (T_1, \dots, T_M) is obtained by removing zero or more strings from (S_1, \dots, S_N) and lining up the remaining strings without changing the order.

Sample Input 1

5 3
tokyo kanda akiba okachi ueno
tokyo akiba ueno

Sample Output 1

Yes
No
Yes
No
Yes

Sample Input 2

7 7
a t c o d e r
a t c o d e r

Sample Output 2

Yes
Yes
Yes
Yes
Yes
Yes
Yes

Express trains may stop at all stations.